NUMERICAL STUDY ON OUT-OF-PLANE PUNCHING OF REINFORCED CONCRETE SLAB UPON LAYERED SHELL MODEL

The layered shell model is a potent tool for the precise and efficient simulation of structures. However, its out-of-plane punching effect remains the only loading condition that traditional layered shell models are incapable of simulating. To further investigate the complete force-bearing process of punching, this study, based on the traditional layered shell element, defines the nonlinear out-of-plane constitutive behavior on the basis of existing experimental data. The parameters of the out-of-plane constitutive behavior are calibrated according to a punching test database, enabling the simulation of punching phenomena through secondary development. The study analyzes the influence patterns of concrete strength and anti-punching reinforcements on the punching failure modes and punching bearing capacity, resulting in the formation of a novel layered shell element capable of simulating the out-of-plane punching effect. The simulation efficacy of the layered shell element considering the out-of-plane punching effect is validated through a punching database.